Upper Half:

Josh’s Upper half counter rotates more than just about anyone in the big leagues. To most people it would look like he counter rotates and then pulls off as hard as he can to throw the ball hard. When you slow things down a bit you see that he comes out of counter rotation slightly before breaking his hands. After breaking his hands, he does not continue opening his upper half until his arm is up, cocked in the correct position. After his arm is cocked he finishes rotation. This allows him to throw through the catcher and not just spin around his front side.

Lower Half:

Josh’s Lower half is very deceiving. After his peak leg left and counter rotation he starts gaining ground towards home. He strides closed, staggered. Normally this would mean that he wouldn’t be able to fully open his hips towards home. Hader is able to get his hips fully open by over-opening his foot. His front foot opens to match his direction and momentum that is taking him down the mound and across his body toward a left handed batter. At the last second his front foot opens into the over-opened position which gives him the direction back to home plate.